Datasheet

Section 7 DMA Controller (Not Supported in the H8S/2321)
Rev.6.00 Sep. 27, 2007 Page 228 of 1268
REJ09B0220-0600
Bit 5—Repeat Enable (RPE): Used in combination with the DTIE bit in DMABCR to select the
mode (sequential, idle, or repeat) in which transfer is to be performed.
Bit 5
RPE
DMABCR
DTIE Description
0 0 Transfer in sequential mode (no transfer end interrupt) (Initial value)
1 Transfer in sequential mode (with transfer end interrupt)
1 0 Transfer in repeat mode (no transfer end interrupt)
1 Transfer in idle mode (with transfer end interrupt)
For details of operation in sequential, idle, and repeat mode, see section 7.5.2, Sequential Mode,
section 7.5.3, Idle Mode, and section 7.5.4, Repeat Mode.
Bit 4—Data Transfer Direction (DTDIR): Used in combination with the SAE bit in DMABCR
to specify the data transfer direction (source or destination). The function of this bit is therefore
different in dual address mode and single address mode.
DMABCR
SAE
Bit 4
DTDIR Description
0 0 Transfer with MAR as source address and IOAR as destination
address (Initial value)
1 Transfer with IOAR as source address and MAR as destination address
1 0 Transfer with MAR as source address and DACK pin as write strobe
1 Transfer with DACK pin as read strobe and MAR as destination address